Bumper beam structure having support walls for center gusset, which are laid over walls of bumper beam

Abstract

A bumper beam structure has a metal and molded bumper beam main body extending in a width direction of a vehicle, wherein a rear face of the main body is joined to side frames of the vehicle; and a center gusset joined to a center portion of the bumper beam main body in the length direction of the main body so as to produce a closed section at a front face of the bumper beam main body. The center gusset has a pair of support walls which are respectively adhered and fastened to upper and lower walls of the bumper beam main body in a manner such that the support walls are respectively laid over the upper and the lower walls. Preferably, in each support wall, ends in a length direction of the support wall are inclined with respect to a plane which is perpendicular to the length direction.

1. A bumper beam structure, comprising:
 a bumper beam main body which is a metal and molded material and extends in a width direction of a vehicle, wherein a rear face side of the bumper beam main body is joined to side frames on either side of the vehicle; and 
 a center gusset joined to a substantially center portion of the bumper beam main body in the length direction of the bumper beam main body so as to produce a closed section at a front face of the bumper beam main body, wherein: 
 the center gusset has a pair of support walls which are respectively adhered and fastened to upper and lower walls of the bumper beam main body in a manner such that the support walls are respectively laid over the upper and the lower walls, and wherein in each support wall, ends in a length direction of the support wall are inclined with respect to a plane which is perpendicular to the length direction. 
 
   
   
     2. The bumper beam structure according to  claim 1 , wherein in each support wall, ends in a length direction of the support wall are inclined with respect to a plane which is perpendicular to the length direction. 
   
   
     3. The bumper beam structure according to  claim 1 , wherein:
 the bumper beam main body has a front wall and a rear wall, and an intermediate wall for connecting the front and the rear walls which is integrally formed with the front and the rear walls; and 
 the center gusset has a rib provided on a back face of the center gusset in a manner such that the rib faces a front face of the front wall of the bumper beam main body and that the rib and the intermediate wall form a straight line. 
 
   
   
     4. The bumper beam structure according to  claim 1 , wherein a rib protrudes from the center gusset and extends in the length direction of the bumper beam main body. 
   
   
     5. A bumper beam structure, comprising:
 a bumper beam main body which is a metal and molded material and extends in a width direction of a vehicle, wherein a rear face side of the bumper beam main body is joined to side frames on either side of the vehicle; and 
 a center gusset has a pair of support walls which are respectively adhered and fastened to upper and lower walls of the bumper beam main body in a manner such that the support walls are respectively laid over the upper and the lower walls, wherein the center gusset has a fitting portion which contacts a front face of a front wall of the bumper beam main body, and wherein the center gusset has a fitting portion which contacts a front face of a front wall of the bumper beam main body. 
 
   
   
     6. The bumper beam structure according to  claim 5 , wherein:
 the bumper beam main body has an intermediate wall for connecting the front wall and a rear wall of the bumper beam main body, and the intermediate wall is integrally formed with the front and the rear walls; and 
 the center gusset has a rib provided on a back face of the center gusset in a manner such that the center gusset rib faces the front face of the front wall of the bumper beam main body and such that the center gusset rib and the intermediate wall form a straight line. 
 
   
   
     7. The bumper beam structure according to  claim 5 , wherein a rib protrudes from the center gusset and extends in the length direction of the bumper beam main body. 
   
   
     8. A bumper beam structure, comprising:
 a bumper beam main body which is a metal and molded material and extends in a width direction of a vehicle, wherein a rear face side of the bumper beam main body is joined to side frames on either side of the vehicle, and wherein the bumper beam main body has: 
 a front wall and a rear wall, and an intermediate wall for connecting the front and the rear walls which is integrally formed with the front and the rear walls; and 
 a rib provided on a front face of the front wall in a manner such that the rib and the intermediate wall form a straight line and such that the rib faces a back face of a center gusset; and 
 the center gusset is joined to a substantially center portion of the bumper beam main body in a length direction of the bumper beam main body so as to produce a closed section at a front face of the bumper beam main body, wherein: 
 the center gusset has a pair of support walls which are respectively adhered and fastened to upper and lower walls of the bumper beam main body in a manner such that the support walls are respectively laid over the upper and the lower walls. 
 
   
   
     9. The bumper beam structure according to  claim 8 , wherein:
 the center gusset has a rib provided on the back face of the center gusset in a manner such that the center gusset rib and the front wall rib face each other, and can contact each other when a crash occurs. 
 
   
   
     10. The bumper beam structure according to  claim 9 , wherein the center gusset has a fitting portion which contacts the front face of the front wall of the bumper beam main body. 
   
   
     11. The bumper beam structure according to  claim 9 , wherein the center gusset rib protrudes from the center gusset and extends in the length direction of the bumper beam main body. 
   
   
     12. The bumper beam structure according to  claim 8 , wherein a rib protrudes from the center gusset and extends in the length direction of the bumper beam main body. 
   
   
     13. The bumper beam structure according to  claim 12 , wherein the center gusset has a fitting portion which contacts the front face of the front wall of the bumper beam main body. 
   
   
     14. The bumper beam structure according to  claim 8 , wherein the center gusset has a fitting portion which contacts the front face of the front wall of the bumper beam main body. 
   
   
     15. The bumper beam structure according to  claim 8 , wherein the center gusset has a center gusset rib provided on the back face of the center gusset in a manner such that the center gusset rib faces the front face of the front wall of the bumper beam main body and that the center gusset rib and the intermediate wall form a straight line.